2009 Cadillac STS-V Owner's Manual - Page 115

How the System Works URPA comes on automatically when the shift lever is moved into R (Reverse). The rear display briefly illuminates to indicate the system is working. URPA operates only at speeds less than 3 mph (5 km/h). If the vehicle is above this speed, the red light on the rear display will flash. To be detected, objects must be at least 10 inches (25.4 cm) off the ground and below trunk level. Objects must also be within 5 feet (1.5 m) from the rear bumper. This distance may be less during warmer or humid weather. A single beep will sound the first time an object is detected between 20 inches (0.5 m) and 5 feet (1.5 m) away. Beeping will occur when the vehicle is closer than 20 inches (0.5 m) from the object. The following describes what will occur with the URPA display as the vehicle gets closer to a detected object: Description amber light amber/amber lights amber/amber/red lights/continuous beep amber/amber/red lights flashing and continuous beep English 5 ft 40 in 20 in 1 ft Metric 1.5 m 1.0 m 0.5 m 0.3 m 2-43